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/* GDK - The GIMP Drawing Kit
*
* gdkglcontextprivate.h: GL context abstraction
*
* Copyright © 2014 Emmanuele Bassi
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <gdkenums.h>
G_BEGIN_DECLS
/* Version requirements for EGL contexts.
*
* If you add support for EGL to your backend, please require this.
*/
#define GDK_EGL_MIN_VERSION_MAJOR (1)
#define GDK_EGL_MIN_VERSION_MINOR (4)
/* Minimum OpenGL versions supported by GTK.
* Backends should make sure to never create a context of a previous version.
*
* The macros refer to OpenGL; OpenGL with OPENGL_COMPATIBILITY_PROFILE_BIT as
* OPENGL_PROFILE_MASK; and OpenGL ES respectively
*/
#define GDK_GL_MIN_GL_VERSION GDK_GL_VERSION_INIT (3, 2)
#define GDK_GL_MIN_GL_LEGACY_VERSION GDK_GL_VERSION_INIT (3, 0)
#define GDK_GL_MIN_GLES_VERSION GDK_GL_VERSION_INIT (2, 0)
typedef struct _GdkGLVersion GdkGLVersion;
struct _GdkGLVersion
{
int major;
int minor;
};
#define GDK_GL_VERSION_INIT(maj,min) { maj, min }
static const GdkGLVersion supported_gl_versions[] = {
GDK_GL_VERSION_INIT (4, 6),
GDK_GL_VERSION_INIT (4, 5),
GDK_GL_VERSION_INIT (4, 4),
GDK_GL_VERSION_INIT (4, 3),
GDK_GL_VERSION_INIT (4, 2),
GDK_GL_VERSION_INIT (4, 1),
GDK_GL_VERSION_INIT (4, 0),
GDK_GL_VERSION_INIT (3, 3),
GDK_GL_VERSION_INIT (3, 2),
GDK_GL_VERSION_INIT (3, 1),
GDK_GL_VERSION_INIT (3, 0),
GDK_GL_VERSION_INIT (0, 0)
};
static const GdkGLVersion supported_gles_versions[] = {
GDK_GL_VERSION_INIT (3, 2),
GDK_GL_VERSION_INIT (3, 1),
GDK_GL_VERSION_INIT (3, 0),
GDK_GL_VERSION_INIT (2, 0),
GDK_GL_VERSION_INIT (0, 0)
};
#undef GDK_GL_VERSION_INIT
#define GDK_GL_VERSION_INIT(maj,min) (GdkGLVersion) { maj, min }
#define GDK_GL_VERSION_STRING(str) GDK_GL_VERSION_INIT(str[0] - '0', str[2] - '0')
static inline const GdkGLVersion *
gdk_gl_versions_get_for_api (GdkGLAPI api)
{
switch (api)
{
case GDK_GL_API_GL:
return supported_gl_versions;
case GDK_GL_API_GLES:
return supported_gles_versions;
default:
g_assert_not_reached ();
return NULL;
}
}
static inline int
gdk_gl_version_get_major (const GdkGLVersion *self)
{
return self->major;
}
static inline int
gdk_gl_version_get_minor (const GdkGLVersion *self)
{
return self->minor;
}
static inline int
gdk_gl_version_compare (const GdkGLVersion *a,
const GdkGLVersion *b)
{
if (a->major > b->major)
return 1;
if (a->major < b->major)
return -1;
if (a->minor > b->minor)
return 1;
if (a->minor < b->minor)
return -1;
return 0;
}
static inline gboolean
gdk_gl_version_greater_equal (const GdkGLVersion *a,
const GdkGLVersion *b)
{
return gdk_gl_version_compare (a, b) >= 0;
}
/* in gdkglcontext.c */
void gdk_gl_version_init_epoxy (GdkGLVersion *version);
G_END_DECLS
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